A cheaper browser agent vs CodeTrain

What changed when we replaced repeated tool selection with a compact program executed against a text-first browser state.

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start.

About A cheaper browser agent

What changed when we replaced repeated tool selection with a compact program executed against a text-first browser state. Page context is compressed DOM trees that get cached on next call. There is an adversarial relationship between developers and the big model labs. The labs use that margin to subsidize their own apps, their own competing agent harnesses, and their own consumer subscriptions. If you are building an AI IDE, browser agent, support agent, or workflow product on top of a frontier API, you are often subsidizing the company trying to replace you.

About CodeTrain

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start. Two steps, about a minute, and the first one is going to catch you. The tutor's replies are pre-recorded, so it knows the handful of ways this lesson usually goes wrong. The real one reads whatever you actually wrote, and it is free for ten lessons a month.